Insights into the mechanism of peroxydisulfate activated by magnetic spinel CuFe2O4/SBC as a heterogeneous catalyst for bisphenol S degradation
文献类型： 外文期刊
作者： Wang, Bingyu 1 ; Li, Qiaoqiao 1 ; Lv, Ying 1 ; Fu, Haibin 1 ; Liu, Dingyi 1 ; Feng, Yanfang 2 ; Xie, Huifang 1 ; Qu, Hong 1 ;
作者机构： 1.Nanjing Univ Sci & Technol, Sch Environm & Biol Engn, Jiangsu Key Lab Chem Pollut Control & Resources R, Nanjing 210094, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Minist Agr & Rural Affairs, Key Lab Agroenvironm Downstream Yangtze Plain, Nanjing 210014, Peoples R China
3.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212001, Jiangsu, Peoples R China
4.Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China
5.Nanjing Univ, State Key Lab Pollut Control & Resource Reuse, Sch Environm, Nanjing 210023, Jiangsu, Peoples R China
关键词： SBC; PDS; BPS degradation; Surface-bound radical; Non-radical process
期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：10.652； 五年影响因子：9.43 ）
ISSN： 1385-8947
年卷期： 2021 年 416 卷
页码：
收录情况： SCI
摘要： The CuFe2O4 catalyst in advanced oxidation processes had received much attention, while the leaching metal ions and its agglomeration limited its application prospect. The conversion of waste activated sludge (WAS) into sludge-derived biochar (SBC) through pyrolysis could not only be the option of reducing the environmental burden but also converted to be the value-added environmental remediation materials. Hence, the present study prepared as a CuFe2O4/SBC heterogeneous catalyst to degrade new environmental pollutants (bisphenol S, BPS). To our best knowledge, CuFe2O4/SBC as a heterogeneous catalyst activating peroxydisulfate to degrade BPS in solution is rarely reported, and the catalytic performances and degradation mechanism of CuFe2O4/SBC need to be comprehensively investigated. The synergistic effect between CuFe2O4 and SBC enhanced catalytic performances and alleviated agglomeration. The CuFe2O4/SBC was greatly ameliorated metal ions leaching, but the synthetic strategy could better optimize to further reducing Cu ion leaching. The dominant role of heterogeneous catalysis by CuFe2O4/SBC also have been elucidated. It was proposed that radical (?OH and SO4?? ) and non-radical (1O2) oxidation processes worked together for BPS degradation, but surface-bound radical pathways played more crucial roles. Some intermediate products with higher toxicity may be produced due to the non-completely mineralized, thus future attention should be paid to their environmental risks. Hence, the detoxification efficiency of CuFe2O4/SBC needs to be further strengthened via improving the reaction conditions. Overall, this study provided a new strategy to simultaneously solve the problems of WAS disposal and leaching metal ions of
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